Having trouble getting a good lather? Hard water is water that contains an excessive amount of minerals. It can dry your skin, make your hair dull, and leave mineral deposits in sinks, around faucets and in pots and pans used to boil water. These deposits should be removed on a regular basis — they can corrode faucets and pipes and cause rust in sink and tubs.
Hard water stains can be removed by heating up some white vinegar and applying it to the stained area for about 15-20 minutes. Rub with a rag (I use old terrycloth towels or washcloths as rags), rinse and dry. Repeat, if necessary. When you rub the area, dampen the rag with vinegar and sprinkle it with baking soda – buff the stains. Rinse and dry.